Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d2b05e4c5bdbd3…

MALICIOUS

PDF

74.9 KB Created: 2021-09-07 05:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2fd61dc884b7d515b99c7b90ca3efd83 SHA-1: 687aeeb8d4d1da39e61fafb1eb88426c643e5350 SHA-256: 00d2b05e4c5bdbd301182fec11249dc5d13494c7cf536b133587136f60b0b83d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. Embedded JavaScript was also detected, suggesting potential malicious scripting capabilities within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9788

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://archism.ru/uplcv?utm_term=patwari+syllabus+punjab+pdf PDF link annotation
    • http://abpaluso.com/upload/file/zisixilepuxij.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/visomakokiwewire.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a87dc02b1---wenivifeloro.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/kazad.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/52599540318.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad96f9c3900---labelosa.pdfIn PDF document text
    • https://stbenedikt.ch/userfiles/files/wedemizazuk.pdfIn PDF document text
    • http://specimport.by/files/files/mekagubopepul.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/31071492242.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/b7b71e32b63e6d5fe378b4a7f470d8c4/jemidojijezasozolunoxivux.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611958002df48---sibusasedagarox.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/e1aih6jico9o0p9psr90ouv1hn/7253052383.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/95518677703.pdfIn PDF document text
    • http://dollreunion2020.com/clients/4/43/4392dc7a9e9236654a628da0af121bbb/File/24400835020.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/3743699077.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/58565821185.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/29042934969.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/somapejizoxopumunawefu.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612c2fd512bba---15180963932.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/25659428182.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/kowolov.pdfIn PDF document text
    • https://www.highlandernepal.com/assets/ckfinder/userfiles/files/40730092970.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/17299650595.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/603e958692cf992dbfcaa0f3b2812279/69511903838.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/5fa0beea22220f246f7e1dd8d71fd26d/wakelajubozenizonitugum.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/23145245869.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/78d1a7bdb5ad088243a7c27af7b697ab/66493807938.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB99D 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_01_sfnt_off0000c195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC195 17076 bytes
SHA-256: 6751ffbec8d1c45e0fbb899b271a8c5fae1d8de397d3ecdfaa2382e25f1ee3af
font_02_sfnt_off0000ec6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00010486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10486 10812 bytes
SHA-256: 577f3dd93fde1c4150fd3fd2aa20f97f6f4c74f7493382c57c1c23c8624859bd

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